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TRIAL STUDIES ON THE COHERING AND ANCHORING PROPERTIES OF CONCRETE BEAMS STRENGTHENED WITH CFRP SHEETS
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摘要: 对预应力碳纤维板材加固混凝土梁构件的应用做了初步的研究,提出了应用预应力碳纤维板材加固梁构件的试验施工工艺;对施加预应力后的碳纤维板与混凝土结构结合面间的粘结锚固的可靠性和通过粘结锚固能施加到混凝土结构上的有效预应力进行了试验研究。试验研究结果表明,在研究并采用了一种简单适用的新型粘结锚固措施后,碳纤维板张拉力能有效地通过粘结和锚固将预应力加到混凝土结构上,能施加的有效预应力为张拉力的65%~80%,试验结果可为工程应用提供有益的参考。Abstract: It is presented a primary study of strengthening reinforced concrete beam using prestressing CFRP sheets and its processing technology of strengthening in laboratory.It was studied that the cohering properties of CFRP sheets and concrete,the measured effective prestress which could be applied to the reinforced concrete beam.By studying and adopting a new anchoring measure,prestress can be effectively transferred to the reinforced concrete beam,and the effective prestress applied to the reinforced concrete beam is 70%～80%of the total prestress.The experimental results are valuable for applying in engineerings.
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Key words:
- CFRP sheets /
- strengthening /
- anchoring measure /
- effective prestress
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尚守平, 彭 晖, 童 桦, 等. 预应力碳纤维布材加固混凝土受弯构件的抗弯性能研究. 建筑结构学报,2003, 124(5) 飞 渭, 江世永, 彭飞飞, 等. 预应力碳纤维布加固混凝土受弯构件正截面承载力分析. 四川建筑科学,2003, 129(3) 姚 谏, 滕锦光. FRP-混凝土的抗剪粘结强度试验研究M岳清瑞. 第二届全国土木工程用纤维增强塑料(FRP) 应用技术学术交流会论文集. 北京: 清华大学出版社, 2002: 86-95 谭 壮, 叶列平. FRP 加固混凝土结构剥离问题研究综述M岳清瑞. 第二届全国土木工程用纤维增强塑料(FRP) 应用技术学术交流会论文集. 北京: 清华大学出版社, 2002:229-234 刘廷全, 胡寿康, 华 玉. 碳纤维布与混凝土粘结性能试验研究M岳清瑞. 第二届全国土木工程用纤维增强塑料(FRP) 应用技术学术交流会论文集. 北京: 清华大学出版社, 2002: 347-350 Chajes M J, Finch W W Jr, Januszka T F, et al. Bond and ForceTransfer of CompositesMaterial Plates Bonded to Concrete.ACI StructuralJournal, 1996,93(2): 295-303 Chen J F, Teng J G. Anchorage StrengthModels forFRP and Steel PlatesBonded to Concrete. Journal of Structural Engineering, ASCE. 2001,127(7): 784-791 -
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